| Maximum pending asynchronous I/O for a file This is the maximum I/O operations the DS-Client will queue for each file from this backup set. | |
| Use DS-Client’s settings | (Default) Uses the setting in the DS-Client Advanced Configurations > Category: Performance > Parameter: MaxPendingIOPerFile. | 
| Use specific value | You can override the default and set a custom value that only applies for this backup set. •	This option is intended for high performance backup environments. You must be able to test the different settings to determine the optimal value. •	This is only useful if the target storage containing the backup data is fast and efficient enough to take advantage of the increased I/O. •	WARNING: Slower storage can suffer performance drops if this value is increased too much. | 
| Read buffer size for backup This option adjusts the internal buffer amount that the DS-Client allocates for reading individual files for backup. | |
| Use DS-Client’s settings | (Default) Uses the setting in the DS-Client Advanced Configurations > Category: Performance > Parameter: FileReadBufferSize. | 
| Use specific buffer size (KB) | You can override the default and set a custom value that only applies for this backup set. •	You must be able to test the different settings to determine the optimal value. •	WARNING: Slower storage can suffer performance drops if this value is not properly set. |